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Appendix II.

785

complete the mould, which, finally supplied with gates and runners
GG and risers R R, is ready for casting.              !

P. 34. Moulding Machines.—Besides the machine on p.
32, which has only one use, that of moulding wheel teeth, there

are many machines suited to general repetition work,, which is
thus done both more quickly and more accurately. The opera-
tions of hand moulding -are more or less simulated,,that is, the
pattern is first secured in position, and fastened to the box, the
sand is next rammed, usually with the box upside down, and